WW testing will need to include APS and CC information. See http://us.battle.net/d3/en/forum/topic/7788988884?page=2#31 for preferred methodology, but feel free to post your own results with how you obtained them.
Recent results from a couple people have suggested that the CM proc rate might not be as straight forward as we assume. Currently, the general consensus is that CM reduces the cooldown of all your spells after you crit and pass a check against the spell coefficient. For WW that means 12.5% of your WW tics that crit would proc CM. There is now cause to think that CM works in a slightly different manner.
The first post I saw with some evidence contrary is here by UBORLOL http://us.battle.net/d3/en/forum/topic/6794871641?page=25#481
Steve's DPS simulator already uses a CM coeffcieient of 2 because he noticed his in game results weren't lining up properly with the simulator results. Meaning for WW 25% of your WW tics would proc CM instead of 12.5%. He has some data findings on his simulator page, but I haven't had a chance to look through those on account of being an old fashioned IE user. His simulator thread is linked below, and links to his simulator can be found there.
I have also done some limited testing and my one test case gave me 37 DS casts over a 88s fight against Ghom where I did nothing except cast DS and WW. DS rune was crystal shell so my only CM procs should have been from WW and white attacks, and I only had a couple white attacks. Simulating the results with our original assumption of how CM works shows I should only average 24 DS casts in that time frame, and after 500 simulations the most casts I should have seen was 27, a full 10 less than I actually got. In other words, I'm seeing a lot more CM procs in game than I should be.
These results are actually consistant with my SA examination in which I found SA was procing quite a bit more often from WW as it should.
What I'd like to do is ask for some people to do a few tests on their own. The idea is record a fight, preferably 40-60s+, then count how many DS casts you get off. For the fight just use 1 spell and DS. I would love to have data from several different spells to see if the behavior is specific to dot type spells like WW or also applies to sig spells and such.
List of Spells:
For those willing to help test, pick a spell and rune and record DS casts and fight duration, as well as attack speed and crit chance. Your dps doesn't matter and 1-2 fights should be fine for the test, so don't worry about carrying out 20 tests to average over. Preferably do the fights against Ghom, and run to a corner at the start of the fight, wait for him to reach you, then spam the spell of choice while refreshing DS as often as possible.